Error correction encoding/decoding method and apparatus therefor

Details Error correction encoding/decoding method and apparatus therefor Error correction encoding/decoding method and apparatus therefor

1994-07-15

1995-03-14

Beausoliel, Jr., Robert W.

Excavating

G06F 1110, H03M 1312

Patent

active

053982541

ABSTRACT:
The invention provides greater error correction capability in an error correction encoding/decoding system of a digital mobile telephone or so forth. In a viterbi decoding system at a receiver side, a branch metric is calculated and stored without selecting a path with respect to a plurality of branches corresponding to a parameter having a correlation between frames. Also, by utilizing a separately stored parameter value in a previous frame, a transition probability of the parameter value in the current frame is obtained, a metric value of a path is converted and added to an accumulated path metric value up to the previous branch, a comparison of the metric values at various states is performed to select the path having higher likelihood to perform decoding by maximum likelihood decoding.

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